/*
   POSIX getopt for Windows

   AT&T Public License

   Code given out at the 1985 UNIFORUM conference in Dallas.
 */


#include "wingetopt.h"
#include <stdio.h>
#include <string.h>
/*
 #define NULL	0
 #define EOF	(-1)
 */
#define ERR(s, c)   if (opterr) { \
        char errbuf[2]; \
        errbuf[0] = c; errbuf[1] = '\n'; \
        fputs(argv[0], stderr); \
        fputs(s, stderr); \
        fputc(c, stderr); }
/*
   (void) write(2, argv[0], (unsigned)strlen(argv[0]));\
   (void) write(2, s, (unsigned)strlen(s));\
   (void) write(2, errbuf, 2);}
 */
int opterr = 1;
int optind = 1;
int optopt;
char    *optarg;

int getopt(int argc, char **argv, char *opts)
{
    static int sp = 1;
    register int c;
    register char *cp;

    if (sp == 1) {
        if (optind >= argc ||
            argv[optind][0] != '-' || argv[optind][1] == '\0')
            return EOF;
        else if (strcmp(argv[optind], "--") == 0) {
            optind++;
            return EOF;
        }
    }
    optopt = c = argv[optind][sp];
    if (c == ':' || (cp = strchr(opts, c)) ==  NULL) {
        ERR(": illegal option -- ", c);
        if (argv[optind][++sp] == '\0') {
            optind++;
            sp = 1;
        }
        return '?';
    }
    if (*++cp == ':') {
        if (argv[optind][sp + 1] != '\0')
            optarg = &argv[optind++][sp + 1];
        else if (++optind >= argc) {
            ERR(": option requires an argument -- ", c);
            sp = 1;
            return '?';
        } else
            optarg = argv[optind++];
        sp = 1;
    } else {
        if (argv[optind][++sp] == '\0') {
            sp = 1;
            optind++;
        }
        optarg = NULL;
    }
    return c;
}


